Improvement in fire-bricks for furnaces



F. STRATTNER.

Fire-Brick for Furnaces.

N0.,l64,494. Patentedlllne15,1875.

UNITED STATES PATENT OEEIcE.

FREDERICK STRATTNER, OF WILMINGTON, DELAWARE.

IMPROVEMENTYIN FIRE-BRICKS FOR FURNACES.

Specification forming part of Letters Patent No. 164,494, dated June 15,1875 application filed December 10, 1874. v

To all whom t may concern.'

Be it known that I, FREDERICK STRATT- NER, of Wilmington, in the countyof New Castle and State of Delaware, have invented certain new anduseful Improvements in Fire- Brick for Furnaces; and I do hereby declarethat the following is a full, clear, and exact description thereof,which will enable others skilled in the art to which it pertains to makeand use the same, reference being had to the accompanying drawings, andto the letters of reference marked thereon, which form a part of thisspecification. v

The nature of my invention consists in the construction and arrangementof a fire-brick for locomotive and other furnaces, as will behereinafter more fully set forth.

In the accompanying drawing. Figure 1 is a perspective View of afire-brick embodying my invention. Fig. 2 is a plan view of a metallicframe molded in the brick.

A represents a fire-brick provided with my improvements. In the moldingor manufacturing of this brick,- a metallic frame is molded into thebrick, said frame consisting of two hollow tubes, B B, placedtransversely in the brick, and connected by means of cross-bars C G,which may be hollow or otherwise, as desired, by which means the brickis made stronger and more durable. The ends of the tubes B B projectbeyond the sides 'of the brick, and they have each a series of perfora.tions, a a, as shown in Fig. 2. In the brick A are made channels orpassages b b, corresponding with the perforations c a in the tubes B B.

The object of the hollow perforated tubes and the channels in the brickis to cause air to be drawn through the same either by the natural draftor by artificial means, which air becomes heated within the brick, andis admitted over the surface of the fire, to increase combustion andconsume the smoke.

In locomotives, where the exhaust steam may be used to create draftthrough the brick, the inner side of the brick is, along the rows ofopenings to the channels b, provided with ledges or projections D D forthe exhauststeam as it escapes from the cylinder to strike against, andthereby draw in air, as the brick are set parallel with the iues.

The metallic frame B U may be omitted, and the brick made hollow, withchannels for the passage ofthe air, which may be supplied from thefront, sides, bottom, or back of the furnace. In a locomotive it willrequire holes through the furnace to communicate with the holes in thebrick. The air passing through the brick keeps them cooler and rendersthem more serviceable.

The brick may be made in two halves-top and bottom-Which, by beingplaced together, forms a complete brick.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is-

l. A fire-brick, in combination with a per,A forated metallic frameincased within said brick, and having channels or passages correspendingwith the perforations in the frame, substantially as and for the purposespecified.

2. The combination of the fire-brick A, having ledges D D and channelsor passages b b, and Jthe hollow metallicl frame B U, provided withperforations a a, all substantially as and for the purposes herein setforth. v

In testimony that I claim the foregoing as my own I affix my signaturein presence of l two witnesses.

FREDK. STRATTNER.

Vi itnesses:

C. H. WATSON, H. A. HALL,

